Improvement in screw-piles



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NHFETERS, PHOTO-UNOGRAPHER, WASHINGTON. D. C.

@tutti (time THOMAS w. H. MosnLnY, or BOSTON, ASsIGNoH 'ro n. r. MosnLnY, SAivuHjLRl MOSELEY, AND ANNA M. 1..-MosnLnY, on HYDE PARK, MASSACHUSETTS.

Letters Patent No.n 109,337, dated November 15, 1870.

The Schedule referred to in these Letters Patent and making part 'of the same.

I, THOMAS W. H. MosnLnY, of Boston, in the State of Massachusetts, have invented certain new and useful Improvements in Piles for Engineering Purposes, of which the'following is a specification.

Nature and Objects of the'Iiwe-nt'iou.

My invention consists lin combining with a hollow metallic pile andsub-pile ot wood, Or other materia-l, a cap so applied as to cause a part of the load to be borne by the sub-pile independently ot' the hollo pile.

Description of the Accompanying Drawing.

Figure l represents'a longitudinal section of a hollow iron pile.

Figure 2 is an elevation of the same.

Figure 3 represents a longitudinal section ot a similar pile with a wooden pile projected through its lower end, and the hollow metallic shell filled witl concrete. Y f

'Figure 4 is au elevation' of a pile similar to that represented in figs. 1, 2, and 3, but with the iukes .or screw-flanges omitted at the eXtreme en'd, so that the. cylindrical en'd will` constitute a 'guide below the General Description My piles are generally of cast iron and hollow, varying in caliber from eight inches to six or more feet, and in thickness of shell from one-half inch to two inches or more.

They are usually made in sections, A A A, from twelve to sixteen feet in length, with tlanges a a at the ends, for the purpose ot' uniting two or more sections as the depth may render necessary.

Near the point or lower end ot' the tirst section are ilukes or screw-danges F F, varying in width from three inches to two feet, aud in pitch as the nature ofthe ground may require.

The spiral dukes or screw-danges usually extend 'for a distance of eight feet from the lower end'of the' pile, though, in some cases, much longer and, in other cases, shorter screws may be used.

. A base, B, exten-ds around the pile above the screwflanges, hax'iug a horizontal width equal to about the vdiameter of the pile.

This base and its strengthening braces or bracket-s C C, to resist the downward pressure, are cast in one piece with the pile.

, After this pile is Screwed or driven home, the soil is taken out of the inside to near its -lower end, and a wooden` pile, G, ot' suiicient length sent down through it to solid bottom, either stone or hard pan. The wooden pile is well banded with iron at both its lower and upper ends, and, when it is of smaller diameter than the interior of the pile A, in vwhich case it may be used with'a hollow pile tapering at its point, the upper end of said wooden pile is provided'with suitable gpides, and when it isdrivento its proper posit-lon, a cast-iron pla-te is placed upon its head inside of the hollow pile, and upon this headis deposited cement with clean sand or concrete, which in time becomes as 'hard and compact as stone.

rllhe pile is tilled within some three or four inches of its top, and a cast head, H, with a coping flange, h, is setonto the concrete, and a gum' gasket on top of the cast pile, beneath the coping iia'nge h.

Upon this cast head the burden or weight rests, thus dividing the pressure between the shell of the pile and the concrete iilling, and down onto the wooden pile, which rests at its lower end upon a solid foundation.

The pile represented in g. 4 is similar in form and dimensions throughout to that shown in iigs. 1,' 2, and 3, but its tlukes or screw-flanges F do not go down to the bottom of the pile. The object in this is that in a loose shifting soil, such as mud or sand, the pile may have a-guide below the dukes or serew-danges.

By first removing the soil from inside ofthis pile to its lower end, the pile is allowed to sink' down into the cavity thus made, the walls of which surrounding the pile, prevent the foot ot' the latter moving one way or the other out of itsproper position.

.The piles are all set in their exact places and driven down by machinery of my ownpeculiar construction` for this purpose alone.

The cement-filling answers several valuable purposes:

First, it is the body on which the burden may mostly l'est;

Second, it gives weight and strength to the metal.

pile; and

Third, it preserves the -metal from corrosion or oxidation.

C latin.

I claim as my inventionrlhe cap H, so applied as to cause a part of the load to be borne by the sub-pile G, through the rnedium .of a lling of concrete or other suitable material, substantially as described.

THOMAS XV. `H. MOSELEY. lVitnesses:

J. VANDEHVHR, F. HEATH. 

